I have a 2005 Hyundai tuscon I have a code po430 that's comes up.o2

Question

I changed all my 02 sensors...could u tell me if I may have put them in the wrong spot...the code is po430

Answer 1

P0430 Catalsyt system  efficiency below threshold (Bank 2)

This code would be for Bank 2 Sensor 2, Bank 2 is where cylinder 2 is located, Sensor 2 is the downstream 02 sensor, Standing in front of the vehicle what is directly in the front of you is Bank 2. The sensor that set a code is the downstream sensor , If you have put the sensor in the wrong spot you would set another code for the upstream 02 sensor